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Holocene lake level variations of Longmu Co, western Qinghai-Tibetan Plateau
Liu, Xiang-Jun1; Madsen, David B.2; Liu, Ruiyuan1; Sun, Yongjuan1; Wang, Yixuan1
2016-02-01
发表期刊ENVIRONMENTAL EARTH SCIENCES
卷号75期号:4
文章类型Article
摘要Longmu Co is surrounded by conspicuous regressive shorelines attesting to high-water levels in the past. In this study, we dated paleoshoreline sediments around the lake using optically stimulated luminescence (OSL), infrared stimulated luminescence (IRSL) and radiocarbon dating, then explored the forces that drove Holocene lake level variations. We found that: (1) OSL/ IRSL ages are consistent with geomorphic sequences and some extant cosmogenic and U/Th shoreline ages. However, inorganic evaporite crust 14 C ages are much older than corresponding OSL/IRSL ages due to varying lake reservoir effects and should be used with caution; (2) The highest lake levels of Longmu Co (similar to 160-145 m above present) lasted from similar to 12.8 to similar to 11.3 ka. Two periods of abrupt lake level declines occurred at similar to 11.3 and similar to 7.4 ka (lake level dropped similar to 44 and similar to 45 m, respectively), with a gradual regression of similar to 18 m between these two intervals. The lake expanded moderately from similar to 7 to 5.5 ka, then declined once more after similar to 5.5 ka, with this regression accelerating during the last similar to 1.5 ka; (3) The deglacial lake level transgression was likely due to glacier melt waters. The Indian Summer Monsoon reached the Longmu Co watershed and brought precipitation during the early Holocene. Middle to late Holocene lake regression was caused by the retreat of the monsoon and consequent environmental deterioration.
关键词Western Qinghai-tibetan Plateau Paleoshorelines Lake Level Variations Luminescence Dating Radiocarbon Dating
WOS标题词Science & Technology ; Life Sciences & Biomedicine ; Physical Sciences
关键词[WOS]REGENERATIVE-DOSE PROTOCOL ; PALEOENVIRONMENTAL IMPLICATIONS ; MONSOON VARIABILITY ; AEOLIAN SEDIMENTS ; SOUTHERN TIBET ; ASIAN MONSOON ; TANGRA YUMCO ; SUMXI CO ; ICE CORE ; LUMINESCENCE
收录类别SCI
语种英语
WOS研究方向Environmental Sciences & Ecology ; Geology ; Water Resources
WOS类目Environmental Sciences ; Geosciences, Multidisciplinary ; Water Resources
WOS记录号WOS:000371393400024
引用统计
被引频次:5[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.isl.ac.cn/handle/363002/6301
专题青海盐湖研究所知识仓储
中国科学院青海盐湖研究所
盐湖地质与环境实验室
作者单位1.Chinese Acad Sci, Qinghai Inst Salt Lakes, Xining 810008, Peoples R China
2.Lanzhou Univ, Res Sch Arid Environm & Climate Change, MOE Key Lab West Chinas Environm Syst, Lanzhou 730000, Peoples R China
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GB/T 7714
Liu, Xiang-Jun,Madsen, David B.,Liu, Ruiyuan,et al. Holocene lake level variations of Longmu Co, western Qinghai-Tibetan Plateau[J]. ENVIRONMENTAL EARTH SCIENCES,2016,75(4).
APA Liu, Xiang-Jun,Madsen, David B.,Liu, Ruiyuan,Sun, Yongjuan,&Wang, Yixuan.(2016).Holocene lake level variations of Longmu Co, western Qinghai-Tibetan Plateau.ENVIRONMENTAL EARTH SCIENCES,75(4).
MLA Liu, Xiang-Jun,et al."Holocene lake level variations of Longmu Co, western Qinghai-Tibetan Plateau".ENVIRONMENTAL EARTH SCIENCES 75.4(2016).
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